Carbureter.



G. J. MAYER.

CARBURETER.

APPLICATION FILED JAN. 5, 1911 1,089,423. Patented Mar. 10, 1914.

GODFRIED J. MAYER, -01 BUFFALO, NEW YORK.

To all whom it may concern.

Be it known that I, Goornmo J. MAYER,

a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Carburetors, of which the following is a s ecification.

This invention re ates'to improvements in carbureters for internal combustion engines, and it has for its objects the provision of simple and effective means for automatically regulating the admission of auxiliary air to the mixing-chamber when the speed of the engine increases so as to prevent rarifying the mixture due to the admission of a greater volume of auxiliary air than would be proportionate to the gasolene or other explosive fluid drawn into the engine; to so govern the admission of air into the carburetor that when starting the engine, the flow of gasolene from the aspirating nozzle will be increased; and to so overn the supply of air, that when running the engine at low speed with a load and the throttle of the carbureter is opened, the in rush of air through the auxiliary air-inlet is controlled so that under l conditions the proper supply of air and gasolene is obtained.

Another object is to so construct a car hureter that the tension of the auxiliary air valve can be easily regulated; and to otherwise improve on carburetors now in use.

The invention consists in the construction,

arrangement and combination of parts to be hereinafter described and particularly pointed out in the subjoined claims.

In the accompanying drawings,-Figure 1. is a central vertical section of the carblr reter. Fig. 2 is a perspective view of the auxiliary airinlct valve and the piston of the dash-pot connected therewith. Fig. 3 is a detached perspective view of'the dashpot chamber. Fig. 4 is a side elevation of the valve in the main air-inlet tube.

Referring now to the drawings in detail, like numerals of reference refer to like parts in the several figures.

The reference numeral 4 designates a hollow casting providing a mixing-chamber 5 having a'lateral extension 6, a carbureting chamber 7 depepding from said mixingchamber, and a mixture-outlet 8 extending upward from said mixing-chamber and sur- 5 rozzr d by a hot-air or hot-water chamber Specification 0! Letters Patent.

Application filed January 5, 1911.

Patented Mar. 10, 1914. Serial No. 600,887.

9 provided to heat the mixture as it passestherethrough. In the mixture-outlet is a.

throttle-valve 10, such as commonly used in carburetors of this ty e, The depending. earbureting-chamber 7 as a reduced extremity 11 into which is threaded a needlevalve 12 to regulate the flow of gasolene or other explosive fluid into the aspiratingnozzle 13 extending centrally into the can hureting chamber. Said last-mentioned chamber extends centrally through a gasoleno feed-chamber 14, the bottom of which has a threaded opening 15 to receive acorrcspondingly threaded portion 16 of said curburetin -chamber; said threaded portion 16; projecting through the bottom of the gasolene feed chamber 14 and having a nut 17 applied thereto which impinges against the underside of the bottom of said gasolene feed chamber with packing material 18 between the two.

Threaded onto the threaded portion 16 of said carhureting-chamber, is an L-shaped air inlet-tube 19 through which the primary air is drawn and from which it passes up through the carbureting-chamber 7 so as to have an aspirating effect on the nozzle 13. Located in said air-inlet tube, which fur uishes the maiiisupply of air to the carbureter, is a butterfly valve 15) having one wing thereof cut away, as at 19", to provide a small opening for the admission of air when said valve is in closed position, The gasolene is fed to the aspirating-nozzle through a passage 20 and the gasolene is retained within the ga'solene feed chamber 14 at the desired level by a float. 21 serving to open and close a valve (not shown) controlling the admission of gasolene to the gasolene feed-chamberflas is common. 7

The lateral extension has an auxiliary air-- inlet tube 22, herein shown as separate from the casting 4, but not necessarily so; said tube being securedto-the casting 4 in any suitable manner such as by lugs 23 through which are'passed screw bolts 24 that take into the casting 4. Said auxiliary air-inlet tube has one end extending into the extensiori 6 of the mixing-chamber, and it is also provided with a valve 25 whereby the volume of air admitted through it may be regulated, and whereby when said valve 25 is closed, the vacuum in the carbureting chamher is increased to increase the flow of gas lene when starting the engine.

The throttle valve 10 has its stem extendin through the curbureting chamber so that it may be actuated in any approved manner, and the valves ll and :25 also have their stems extending through the walls of their respective containing tubes. To the valve 19, a lever 42 is secured which has connec' tion with one arm of a bell crank lever -13 through the medium of a rod 44, the other arm of said bell crank lever having an operating rod 45 secured thereto so that the two valves move in unison, these valves being so positioned relative to each other that they open and close together.

While I have shown the auxiliary air-inlet tube secured to the extension of the mixingchamber, such a tube is not absolutely necessary to the successful operation of my in vention, and in a broad sense, said tube simply serves as the auxiliary air-inlet. 1n alinement with said auxiliary air-inlet or inlet tube, is a threaded opening 26 and in the exact disposition of parts herein shown, said opening is formed in the bottom wall of the extension 6 of the mixing-chamber. Connected to the mixing-chamber is a dash pct 27 which in preferred form comprises a cylindrical dash-pot chamber 28 having-a removable bottom 29 which is secured thereto .in a water-tight manner and an externally threaded sleeve 30 risin; from its top and which is threaded into the opening 26 formed in the extension of the mixing-eham her the upper extremity of said sleeve being preferably tapered, as M31. The sleeve 30 18 of sufiicient length to permit of adjust ment of the dash-pot toward and from the auxiliary air-inlet, and in order to hold the dash-pot in any adjusted position, a jumbnut 32 is provided which is threaded onto said sleeve and impinges against the bottom of the extension 6 of-said mixing-chamber. Connectin the dash-pot with the gasolene feed chamier 14 is a gasolene tube 33. one end being asscd through a stuffing-box 34 on the gaso ene feed-chamber, and the other through a stufiing box 35 in the removable bottom of the dash-pot, a gland 36 of said last-mentioned stufiin -box serving to secure said tube to said das -pot in a water-tight manner, permitting the dash pot to rotate around the said tube when adjusting the same relative to said auxiliary air-inlet.

Closing the auxiliary air-inlet, or more particularly in the representation of my in vention shown in the drawings, the inner end of the auxiliary air-inlet tube,'is an auxiliary air valve 37; it having an axial i stem 38 threaded into one end of a tube 39 i which is slidable in the sleeve 30 of the dash pot, and in the dash-pot chamber is a piston 40 having an axial rod or stem 41 which is threaded into the opposite end of the tube 39, thus holding the auxiliary air-inlet valve and said piston in fixed relation. Uurround .ing the tube 39 is a coil spring 42 which hours with one end against the tapered end of the sleeve 30 and with its other end against the auxiliary air-inlet, valve.

Having thus described the various parts of my invention, I will now proceed to des ribe the relation of the same and the manner in which the parts may lre adjusted and manipulated; also their operation.

The dash-pot as clearly shown is located to one sidebt the gasolene feed chamber and consequently by reason of the connection of tube 33, the gasolene enters the dash-pot from the gasolene feed chamber and is maintaincd at the same level as the gasolene-in said feed-chamber. Now upon starting the engine with which the carbureter is con nected, the suction created h the engine produces a vacuum in the casting 4 and the air rushes into the air-inlc tube 19, then passes up into the carbureting-chamber Where it has an aspirating etlect on the nozzle 13 and consequently carries with it the proper proportion of gasolene, which in its upward passage with the air through the mixing-chamber 5, is thoroughly mixed with the air and passes through the mixture tube 8 to the engine. The tension of the spring 42 and the resistance of the gasolene in the dash-pot prevents the opening of the auxiliary air inlet tube until the suction created by the engine is increased, which, however, occurs only the speed of the engine increases, \vherpupon a greater quantity of gasolene 1s drawn out of the aspirating nozzle; consequently an additional quantity of air should be admitted into the mixing-chamber to retain the proper proportional quantities of air and gasolenc at all times as it passes through the outlet tube 8. Therefore, as the suction increases. the auxiliary air valve 37 is caused to open and admit a quantity of air into the mixingchamber through the auxiliary nininlet tube The amount of auxiliary air admitted is controlled by the said auxiliary air valve, consequently the additional gas-olene drawn fromthe aspirating nozzle is only in pro portion to the additional quantity of air admitted. This being regulated to a niccty by the dash-pot 27 which on being raised or lowered will increase or diminish the pressure of the 'spring against the auxiliary air valve and as a quick opening of the air valve is checked by the dash-pot, due to the.fact that the piston therein mustdisplace the gasolene contained in the dash-pot by forcing it through the small tube 33 and into the gusolene feed-chamber, the opening movement of the valve is retarded, thus preventing the sudden collapse of the spring 38 which wou d otherwise likely occur by a sudden increase of the speed of the engine.

' and The area of the dash-pot is comparatively small and the forcing of the gasolene 'from the same into the gasolene feed chamber would not affect the levelof the gasolene in said teed-chamber owing to the fact that the gasolenc fed from the dash-pot would be consumed by the engine about as i uicldy as introduced into the gasolene feedamber.

The connection of the valves 19* and in the manner described is particularly desirable when starting wear in cold weather, since at such times it is necessary to supply a very rich mixture, and this is obtained by manipulating the operating rod so that both valves are moved into closed position. By this means air is admitted into the car bureteronl through the small openin sprovided in tie main air-inlet tube 19 y the cutting away of a portion of one wing of the valve 19. Under such conditions, suction created in the cerbureter by the engine, will not act upon the auxiliary air inlet valve 37, consequently there is no admission of auxiliary and a greater quantity of asoleue is delivered with each stroke of t e engine.

After the engine has started, the operator opens the valves 19 and 25 to the extent de sired so that the mixture gradually becomes normal; and when the valve 25 1S opened, the auxiliary valve 37 is free to perform its proper functions to admit the auxiliary air in proper quantities so as to provide the ropcr proportional delivery of gas and airto the engine.

By the use of my invention, the proper proportion of gasolene and air is maintained pt all times irrespective of the speed of the c gine; and by it, I eliminate all unsteadiin the running of the engine, such as would occur if the auxiliary valve were opened quickly and a greater quantity of auxiliary air adn'iitted, resulting in a bad 'inixmre and improper action of the engine,

vl-lavim gg thus described my invention, what "I I claim is,--

n dash-pot chamber coaxial with. said valve an adjustable toward and from the same, a piston within said dash-pot chamber rigidly i cc ed with said valve, :1 tube connecting s? d dash-pot chamber with said gusolcne clwmber, said dash-potchamber being movable on said tube, and a spring interposed between said dash-pot chamber and said valve.

2. In a carburetor, the combination with a casing havin an air-inlet, a mixture-outlet, an auxi iary air-inlet and having also means for carbureting air passing theresaid dash-pot chamber through, of a valve for opening and closing said auxiliary air-inlet, a dash-pot comprising a chamber containing a liquid and having a sleeve in axial alinement withsaid valve, a piston within said dash-pot chamher acting against the liquid therein, a tube slidable in said casing and connecting'said valve and piston together, and a coil spring between the end of said sleeve and said valve.

3. A carburetor comprising a casing having an air inlet, a mixturesoutlet, an auxiliary air-inlet, and a threaded opening opposite said auxiliary air inlet and having also means for carbureting air passing therethrough, a valve for opening and closing said auxiliary air-inlet,a-. dash-pot comprising a chamber having ah externally threaded sleeve threaded into the threaded opening of said asing and containing a liquid, a piston within said 0 :amber acting against said liquid, a tube slidable in said sleeve and connecting said valve and piston, and a coil spring surrounding said tube and hearing at opposite ends against said valve and the end of said sleeve entered in said casing.

4-. In a carbureter, the combination with a gasolenc feed-chamber adapted to-contain a quantity of gasolcne, of a casing having an air-inlet, a mixture-outlet,'an auxiliary airin'lct and a threaded opening opposite said auxiliary air-inlct and having also means therein for carbureting air passing there through, said means being in connection with said gasolene feed-chamber, a valve for opening and closing said auxiliary air-inlet, a dash-pot comprising a chamber having an externally threaded sleeve threaded into the threaded openin of said casing and contain-. inga quantity o gasolcne, a tube connecting sand chamber with said gasolene feed-chamber so that the gasolcne in said dash-pot chamber is on a level with that in the feedchamber, a piston Within said dash pot chamber acting against the gasolene therein and having connection with said valve, and

a spring tending to hold said valve in closed position.

. 5.. In a carburetor, the combination with a gasolene feed-chamber, of a casing having an air-inlet, a mixture-outlet, an auxiliary air-inlet and a threaded opening opposite said auxiliary air-inlet means within said easinghaving connection with said gasolene chamber for carbureting air passing through said casing, a valve for opening and closing said auxiliary air-inlet,- a dash-potcomprising a chamber having said casing so'as to be adjustable toward and from said auxiliary air-inlet, a piston Within said dash pot chamber, a tube connecting with the gasolene said dash-pot chamtube having connecfeed-chamber to supply her with gasolene, said an externally threaded sleeve threaded into the threaded opening of tion with said dash-pot chamber to permit 1 Signature in the presence of two subscribing the latter to be rotated for adjusting the l witnesses. same relative to said auxiliary alt-Inlet and said piston having connection with said 'GODFRIED JE' valve, and'a spring acting tu'hold hfiid valve Witnesses: in closed osition. V ELLA C. PLUECKHAHN,

In tesinnony whereuf, I have affixed my EMLL NEUHART. 

